Patents by Inventor Richard V. Cartwright

Richard V. Cartwright has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5574240
    Abstract: The present invention provides a propellant for electrothermal-chemical guns comprising a dispersion of one or more energetic solids in an energetic liquid phase. The energetic solid is preferably a nitramine such as cyclotrimethylenetrinitramine (RDX) and the energetic liquid component is preferably a homogeneous liquid that is either aqueous or non-aqueous. Aqueous liquid phases suitable for use in the present invention include concentrated solutions containing at least one nitrate salt. Non-aqueous liquid phases suitable for use include those that contain nitrate ester, nitramine, nitro or azido compounds or mixtures thereof.These propellants provide a high level of energy density because of the use of energetic ingredients and the high loading density allowed with a liquid propellant. The presence of a dispersed solid phase within the continuous liquid phase also permits control of the burning behavior of the propellant by variation of the interfacial area between phases.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: November 12, 1996
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 5125684
    Abstract: A stable extrudable non-azide crash bag propellant composition for generating high quality nitrogen gas and a low temperature process for producing the same from an extrudable mass containing an effective amount of a cellulose-based binder.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: June 30, 1992
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4929290
    Abstract: A propellant composition and method for limiting the corrosive properties of by-products from initiated crash bag propellant compositions comprising a 1(a) or 2(a) group metal azide salt, an oxidizer in the form of an oxide of a non-toxic transition metal element, and an effective amount of a modifier component of the formulaMe.sub.x (An).sub.owhereinMe is a metal cation selected from iron, copper, cobalt, nickel, and molybdenum;An is an anion group which is chemically compatible with and capable of reacting with the metal of the azide salt to form nitrogen gas and non-toxic by-products less corrosive than the corresponding hydroxide of the azide metal would be; andx and o are individually defined as a positive number not exceeding about 4, the sum of which does not exceed about 5.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: May 29, 1990
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4920743
    Abstract: A propellant composition and method for limiting the corrosive properties of by-products from initiated crash bag propellant compositions comprising a 1(a) or 2(a) group metal azide salt, an oxidizer in the form of an oxide of a non-toxic transition metal element, and an effective amount of a modifier component of the formulaMe.sub.x (An).sub.owhereinMe is a metal cation selected from iron, copper, cobalt, nickel, and molybdenum;An is an anion group which is chemically compatible with and capable of reacting with the metal of the azide salt to form nitrogen gas and non-toxic by-products less corrosive than the corresponding hydroxide of the azide metal would be; andx and o are individually defined as positive numbers appropriate to indicate the correct chemical formula.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: May 1, 1990
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4886560
    Abstract: Method and coating composition for promoting ignition of deterrent-coated smokeless propellant by applying thereto a nitrocellulose-based igniter component as an overcoat.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: December 12, 1989
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4734141
    Abstract: A crash bag propellant composition and method for generating non-toxic nitrogen gas comprising an azide salt and an oxidant component in which metal oxides are substantially replaced with one or more bi-metallic complexes containing copper or iron in combination with chromium, molybdenum or tungsten.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: March 29, 1988
    Assignee: Hercules Incorporated
    Inventors: Richard V. Cartwright, Steven J. Hardwick
  • Patent number: 4609415
    Abstract: Method for facilitating the formation and stability of invert water-in-oil emulsion blasting agents by use of a combination of certain surfactants; and corresponding formulations.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: September 2, 1986
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4547232
    Abstract: A high density emulsion blasting agent and method is provided for increasing volume energy and optimizing booster sensitivity of water-in-oil emulsion blasting agents without loss of desirable handling characteristics of invert emulsions by utilizing an effective amount of a special sensitizing formulation in total or partial substitution for gas entraining density control agents.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: October 15, 1985
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4523967
    Abstract: Method of maximizing stability and minimizing production of toxic fumes as explosion by-products by utilizing a moisture resistant blasting composition and said composition, comprising an invert emulsion component having, as the continuous external organic phase thereof, a partial ester of a 2-12 carbon polyhydric alcohol and a tall oil fatty acid, said explosive composition being capable of utilizing sufficient solid oxygen-supplying salt to obtain an Oxygen Balance of about zero without substantial loss of sensitivity.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: June 18, 1985
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4371409
    Abstract: An explosive composition is provided including as a sensitizer, a mixture of metriol trinitrate and diethylene glycol dinitrate, and including dimethylformamide as a polar compatibility additive.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: February 1, 1983
    Assignee: Hercules Incorporated
    Inventors: Richard V. Cartwright, Ronald D. Lees
  • Patent number: 4260711
    Abstract: In the polymerization of 1-olefins using a solid catalyst component composed of a titanium trichloride and an activator component composed of a trialkylaluminum, the stereospecificity of the catalyst is increased by replacing a portion of the trialkylaluminum in the activator component with a dialkylaluminum dialkylphosphate.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: April 7, 1981
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright